The reaction of ethylene with potassium permanganate, is the principle of the reaction between potas

Ethylene reacts with a dilute solution of potassium permanganate at a lower temperature, and two hydroxyl groups are added to the double-bonded carbon atom to generate ethylene glycol, and the purple-red fading of potassium permanganate is used for qualitative testing, and if the reaction conditions are violent, the resulting ethylene glycol is further oxidized, resulting in the breaking of carbon-carbon bonds and the formation of carboxylic acids and carbon dioxide. The reaction formula is as follows: CH2==CH2+MNO4- (permanganate ion with one unit negative charge, superscript) +H2O---Ho-CH2-CH2-OH+MNO2---HCOoh+CO2

Ethylene and potassium permanganate are reduced to Mn3-(Mn=+5)Mn3- at low temperature (5 degrees Celsius) to obtain ethylene glycol, and Mn7+ is reduced to Mn3-(Mn=+5)Mn3- which is very unstable and disproportionated into MnO2 and MnO4-

Under acidic, subtractive and heating conditions, the double bonds are oxidized and broken, resulting in CO2 and water 7-valent Mn being reduced to 2-valent.

In alkaline potassium permanganate, ethylene is reduced to ethylene glycol, which is reduced to manganese dioxide, and in an acidic environment, ethylene is reduced to carbon dioxide, and manganese is reduced to divalent manganese ions.

Oxidation reaction occurs: 5CH2 = CH2 + 12kmNO4 + 18H2SO4 10CO2 + 12mnSO4 + 28H2O + 6K2SO4

Note: This response does not require mastery.

It is related to double bonds.

Potassium permanganate solution is used to absorb water to produce ethylene to prevent precocious water.

2ch2=ch2+12kmno4=4co2+6mno2+6k2mno4+4h2o

Sulfuric acid is to enhance the oxidation of potassium permanganate, if there is no sulfuric acid, the oxidation decreases, the reaction rate decreases, and the reduction products are manganese dioxide and potassium manganate!

The reaction phenomenon appears more slowly!

Formic acid and carbon dioxide are produced.

This is in the university textbook, and it is not required for the college entrance examination.

The answer is that it is an oxidation reaction, and the exam is not required.

I'm in my third year of high school, and I'm studying here.

In addition, the carbon-carbon double bonds of ethylene are broken under the action of potassium permanganate solution and oxidized to carbon dioxide by potassium permanganate solution, while potassium permanganate is reduced and faded; When ethylene and bromine water react, only one carbon-carbon double bond is broken, and an addition reaction occurs to form 1,2 dibromoethane, and the bromine water fades due to the reaction of bromine element.

Potassium permanganate is one of the strongest oxidizing agents, as an oxidant is greatly affected by pH, and has the strongest oxidizing ability in acidic solutions.

Potassium permanganate has strong oxidizing properties and is commonly used as an oxidant in laboratories and industries, and decomposes in case of ethanol. It slowly decomposes into manganese dioxide, potassium salts and oxygen in acidic media.

Reaction equation between ethylene and potassium permanganate: CH2 = base is oxidized to CO2, and the chemical equation, also known as the chemical reaction equation, is a formula that expresses a chemical reaction with a chemical formula. Chemical equations reflect objective facts.

The formula that uses the chemical formula to express the chemical reaction of a substance is called a chemical equation.

The chemical equation not only indicates the reactants, products, and reaction conditions. At the same time, the stoichiometric number represents the quantitative relationship between the reactants and the product substances, and the mass relationship between the substances can also be expressed through the relative molecular mass or relative atomic mass, that is, the mass ratio between the substances. For gas reactants and products, the volume ratio can also be obtained directly from the stoichiometric number.

The equation for the reaction of potassium permanganate with ethylene is: KMNO4 + H2SO4 + H2O + C2H4 CH2COOH + MNSO4 + K2SO4 + H2O

1.Mechanism of reaction

In the reaction, potassium permanganate acts as an oxidizing agent, which causes the ethylene to oxidize and at the same time is reduced itself. The reaction between the double bond of ethylene and the mn(vii) in potassium permanganate results in the production of permanganic acid (hmNO4), Mn(V) and water, which are then oxidized by halogen ions to produce malonic acid.

2.Applications

This reaction is a commonly used method for synthesizing malonic acid, which can be used to prepare dyes, pharmaceuticals, synthetic fibers and other substances. This reaction is essential for maintaining environmental health and human prosperity, and is one of the most important organic synthesis reactions in modern chemistry.

3.Precautions

Potassium permanganate is a strong oxidizing agent that can easily cause violent chemical reactions and fires and should be handled with care. At the same time, precautions should be used during the experiment to avoid accidents.

4.Reaction conditions

The reaction of potassium permanganate with ethylene needs to be carried out under suitable temperature, pressure and acidic conditions. In general, acid-catalyzed reaction conditions can be performed with sulfuric acid or phosphoric acid as an accelerator at temperatures between 25 °C and 40 °C.

5.Reaction characteristics

The reaction between potassium permanganate and ethylene is characterized by poor stability of the reaction intermediate products and easy to decompose, so the reaction speed is relatively fast, and at the same time, the reaction products are also relatively easy to separate and purify, which is one of the classic reaction methods for the synthesis of malonic acid.

6.Further application

In addition to the synthesis of malonic acid, the reaction of potassium permanganate and ethylene can also prepare some other organic substances, such as benzoic acid, succinic acid, etc., which has a good practical application prospect.

7.Mechanism of reaction

The reaction of potassium permanganate with ethylene is an oxidative addition reaction, and the reaction intermediate is propylene oxide. The specific reaction mechanism is as follows:

First, potassium permanganate converts ethylene into ethylene oxide through oxidation. Then, ethylene oxide undergoes an addition reaction catalyzed by acid to generate 1,2-dihydroxypropane. Subsequently, 1,2-dihydroxypropane is hydrolyzed or oxidatively dehydroxylated to form products such as malonic acid or propionaldehyde.

8.Functional group introduced

The reaction of potassium permanganate with ethylene can introduce a carboxylic acid functional group into the ethylene molecule, so as to prepare carboxylic acid-containing compounds such as malonic acid.

9.Precautions for experimental operation

1) The reaction device should be clean and adequately removed from any impurities that may affect the reaction.

2) During the reaction process, the reaction conditions such as temperature, pressure, acidity and so on should be controlled to ensure the success and high yield of the reaction.

3) After the end of the reaction, the reaction products need to be separated, purified and identified to ensure that the pure product is obtained.

In summary, the reaction between potassium permanganate and ethylene is an important organic synthesis reaction, which has a wide range of application prospects and chemical significance.

Reaction of ethylene with potassium permanganate: 5H2 = CH2 + 12kmNO4 + 18H2O = = 12MnSO4 + 6K2SO4 + 10CO2 + 28H2O.

Ethylene reacts with potassium permanganate to distinguish methane from ethylene. The reaction of ethylene with potassium permanganate is the discoloration of the solution of purple potassium permanganate; This reaction belongs to oxidation.

1. The chemical composition of ethylene is two carbon primordial or sub and four hydrogen atoms, and the physical properties of ethylene are colorless and odorless gas insoluble in water.

2. Potassium permanganate is a purple crystalline solid in appearance and properties, which is a strong oxidant, soluble in water and lye, and stable in terms of stability, but it is easy to cause disasters if it comes into contact with flammable materials.

3. The equation for ethylene reaction is as follows:

5ch2＝ch2＋12kmno4＋18h2so4→10co2＋28h2o＋6k2so4＋12mnso4。

4. The reaction between ethylene and potassium permanganate is a redox reaction.

5. Redox reaction is a reaction in which the number of elements oxidized changes before and after the chemical reaction. The essence of a redox reaction is the gain or loss of electrons or the shift of electron pairs. Redox reaction is one of the three basic reactions of chemical reactions.

Natural combustion, respiration, photosynthesis, production of reactive chemical batteries, metal smelting, rocket launches, etc., are all closely related to redox reactions. The study of redox reactions is of great significance to the progress of mankind.

The reaction between ethylene and potassium permanganate is an oxidation reaction. The action of a substance losing electrons is called an oxidation reaction; On the contrary, the action of gaining electrons is called reduction. The oxidation reaction in the narrow sense refers to the combination of the substance and the oxidation, and the reductive reaction refers to the loss of oxygen by the substance.

The oxidation value increases during oxidation and decreases during reduction.

Oxidation and reduction both refer to reactants. The action of introducing oxygen or removing hydrogen from organic matter during the reaction of organic matter is called oxidation, and the effect of introducing hydrogen or losing oxygen is called reduction. The oxidation of a substance that reacts slowly with oxygen and slowly heats up without emitting light is called slow oxidation, such as metal rust, biological respiration bridge deficiency, etc.

Intense luminous oxidation is called combustion.

The reaction equation of ethylene and potassium permanganate is: 5CH2 = CH2 + 12KMNO4 + 18H2SO4 = 10CO2 + 28H20 + 6K2SO4 + 12MnSO4.

Data Extension:

The spatial configuration of ethylene is CH2—CH2, and ethylene is a compound composed of two carbon atoms and four hydrogen atoms. The two carbon atoms are connected by double bonds, and are the basic chemical raw materials for synthetic fibers, synthetic plastics (polyethylene and polyvinyl chloride), and ethanol (alcohol).

Ethylene is formed by petrochemical cracking. In this process, gaseous or light liquid hydrocarbon cracking is heated to 750-950, inducing a number of free radical reactions, and then immediately quenching and freezing the guessing reaction. In this process, large hydrocarbons are converted into smaller hydrocarbons and unsaturated hydrocarbons are reacted.

Ethylene is a plant hormone that regulates growth, development, and aging. All fruits produce trace amounts of ethylene during development, with a low ethylene content when the fruit is not ripe, and a peak of ethylene when the fruit reaches maturity, while the starch content inside the fruit decreases, the soluble sugar content increases, and the color and water-soluble pectin content increases.

When potassium permanganate reacts with ethylene, due to the strong oxidizing property of potassium permanganate, the carbon-carbon double bond of ethylene will be oxidized and broken by potassium permanganate and oxidized to formic acid; Reacting with potassium permanganate, it continues to be oxidized, while carbonic acid is unstable and easy to decompose into carbon dioxide, and the final product is carbon dioxide.

The role of potassium permanganate: potassium permanganate has a strong oxidation effect, which can oxidize the active groups of bacteria and has a good killing effect on various fungi. The adsorption characteristics of the active potassium permanganate adsorbent are to use the strong oxidation of the potassium permanganate adsorbent to oxidize and decompose the reducing harmful gases in the air, so as to achieve the purpose of purifying the air.

Potassium permanganate is a strong oxidant, which releases ecological oxygen in contact with microorganisms or putrid tissues, showing a bactericidal effect. It is reduced to manganese dioxide, which can be combined with proteins. Therefore, low concentrations have an astringent effect and high concentrations have a corrosive effect.